Autonomous System details

AS16246

O2 Czech Republic, a.s. · o2.cz

Czechia

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AS16246 – O2 Czech Republic, a.s.

Field	Value
Country	Czechia
Website	o2.cz
Hosted domains	712
IPv4 addresses	133,120
IPv6 addresses	713,053,462,628,379,038,341,895,553,024
ASN type	ISP
Registry	ripe
Allocated	22 years ago on Oct 21, 2003
Updated	2 years ago on Jun 20, 2024

Netblock	Company	Num of IPs
188.175.0.0/16	O2 Czech Republic, a.s.	65,536
94.74.192.0/18	O2 Czech Republic, a.s.	16,384
82.150.160.0/19	O2 Czech Republic, a.s.	8,192
86.63.192.0/19	O2 Czech Republic, a.s.	8,192
92.240.160.0/19	O2 Czech Republic, a.s.	8,192
213.180.32.0/19	O2 Czech Republic, a.s.	8,192
95.143.128.0/20	O2 Czech Republic, a.s.	4,096
176.98.96.0/20	O2 Czech Republic, a.s.	4,096
178.17.96.0/20	O2 Czech Republic, a.s.	4,096
77.87.232.0/21	CATR	2,048
78.108.152.0/21	Assignment for PorubaNET's FO customers	2,048
91.197.116.0/22	CATR	1,024
185.15.252.0/22	O2 Czech Republic, a.s.	1,024

Netblock	Company
2a02:350::/29	O2 Czech Republic, a.s.
2a03:b4c0::/32	O2 Czech Republic, a.s.

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WHOIS Details

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                                                ASHandle:       AS16246
                                                OrgID:          AS16246
                                                ASName:         AS16246
                                                ASNumber:       AS16246
                                                RegDate:        0000-00-00
                                                Updated:        0000-00-00
                                                TechHandle:     AA00-AAAA
                                                Source:         AAAA

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Hosted Domains

There are 712 domain names hosted across 212 IP addresses on this ASN.

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IP Address	Domain	Domains on this IP
188.175.126.28	██████████	43
82.150.165.218	██████████	34
188.175.30.5	██████████	32
94.74.222.181	██████████	31
94.74.229.44	██████████	30
213.180.34.211	██████████	27
94.74.194.116	██████████	26
213.180.35.58	██████████	20
86.63.219.180	██████████	19
94.74.220.5	██████████	17

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Peers

There are 16 peers for this ASN.

Peers	Name
AS12570	O2 Czech Republic, a.s.
AS197197	CETIN a.s.
AS202657	Pavel Jochim
AS207015	Position s.r.o.
AS212315	Frantisek Toman
AS29321	O2 Czech Republic, a.s.
AS31246	NETBOX Autonomous system
AS39736	ICT Support, s.r.o.
AS41046	O2 Czech Republic, a.s.
AS42000	Futruy s.r.o.
AS44070	O2 Czech Republic, a.s.
AS47681	O2 Czech Republic, a.s.
AS49767	O2 Czech Republic, a.s.
AS50784	Intraweb servis s.r.o.
AS5610	O2 Czech Republic, a.s.
AS62178	MASTER IT Technologies, a.s.

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ASN API & Database

Upstreams

There is 1 peer for this ASN.

upstreams	Name
AS5610	O2 Czech Republic, a.s.

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Downstreams

There are 14 downstreams for this ASN.

Downstreams	Name
AS12570	O2 Czech Republic, a.s.
AS197197	CETIN a.s.
AS202657	Pavel Jochim
AS207015	Position s.r.o.
AS212315	Frantisek Toman
AS29321	O2 Czech Republic, a.s.
AS31246	NETBOX Autonomous system
AS39736	ICT Support, s.r.o.
AS41046	O2 Czech Republic, a.s.
AS44070	O2 Czech Republic, a.s.
AS47681	O2 Czech Republic, a.s.
AS49767	O2 Czech Republic, a.s.
AS50784	Intraweb servis s.r.o.
AS62178	MASTER IT Technologies, a.s.

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Pingable IPs

471 IPs in this ASN replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
82.150.165.37	AS16246 O2 Czech Republic, a.s.	`3.63ms` from Prague, CZ
178.17.98.193	AS16246 O2 Czech Republic, a.s.	`6.17ms` from Prague, CZ
176.98.97.145	AS16246 O2 Czech Republic, a.s.	`1.96ms` from Prague, CZ
94.74.242.2	AS16246 O2 Czech Republic, a.s.	`8.37ms` from Prague, CZ
188.175.138.1	AS16246 O2 Czech Republic, a.s.	`1.61ms` from Prague, CZ
188.175.165.243	AS16246 O2 Czech Republic, a.s.	`7.67ms` from Prague, CZ
188.175.247.1	AS16246 O2 Czech Republic, a.s.	`6.24ms` from Prague, CZ
82.150.174.180	AS16246 O2 Czech Republic, a.s.	`3.82ms` from Prague, CZ
176.98.103.254	AS16246 O2 Czech Republic, a.s.	`1.79ms` from Prague, CZ
188.175.230.81	AS16246 O2 Czech Republic, a.s.	`0.84ms` from Prague, CZ
188.175.98.6	AS16246 O2 Czech Republic, a.s.	`6.37ms` from Prague, CZ
188.175.74.241	AS16246 O2 Czech Republic, a.s.	`6.31ms` from Prague, CZ
188.175.111.77	AS16246 O2 Czech Republic, a.s.	`6.39ms` from Prague, CZ
188.175.224.81	AS16246 O2 Czech Republic, a.s.	`0.83ms` from Prague, CZ
94.74.232.18	AS16246 O2 Czech Republic, a.s.	`5.38ms` from Prague, CZ
86.63.208.249	AS16246 O2 Czech Republic, a.s.	`5.64ms` from Prague, CZ
78.108.152.41	AS16246 O2 Czech Republic, a.s.	`6.15ms` from Prague, CZ
188.175.149.1	AS16246 O2 Czech Republic, a.s.	`8.71ms` from Prague, CZ
77.87.235.65	AS16246 O2 Czech Republic, a.s.	`6.18ms` from Prague, CZ
86.63.214.1	AS16246 O2 Czech Republic, a.s.	`4.21ms` from Prague, CZ
188.175.216.129	AS16246 O2 Czech Republic, a.s.	`3.22ms` from Prague, CZ
2a03:b4c0:2::1	AS16246 O2 Czech Republic, a.s.	`5.40ms` from Prague, CZ
94.74.222.145	AS16246 O2 Czech Republic, a.s.	`2.85ms` from Prague, CZ
2a02:350:1001:2002::1	AS16246 O2 Czech Republic, a.s.	`0.86ms` from Prague, CZ
188.175.172.161	AS16246 O2 Czech Republic, a.s.	`6.21ms` from Prague, CZ

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address	ASN	Details
73.122.172.54	AS7922 Comcast Cable Communications, LLC	`4.70ms` from Atlanta, US
92.224.243.102	AS6805 Telefonica Germany GmbH & Co.OHG	`3.00ms` from Berlin, DE
74.114.160.198	AS3549 Level 3 Parent, LLC	`12.62ms` from Denver, US
101.37.88.70	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`5.13ms` from Hangzhou, CN
121.224.207.54	AS4134 CHINANET-BACKBONE	`7.20ms` from Huai'an, CN
183.167.200.6	AS4134 CHINANET-BACKBONE	`7.78ms` from Huai'an, CN
155.93.206.182	AS37680 Cool Ideas Service Provider (Pty) Ltd	`0.64ms` from Johannesburg, ZA
37.34.160.70	AS42961 Mobile Telecommunications Company K.S.C.P.	`0.59ms` from Kuwait City, KW
83.170.219.134	AS15895 "Kyivstar" PJSC	`0.68ms` from Kyiv, UA
81.101.166.118	AS5089 Virgin Media Limited	`5.85ms` from London, GB
90.212.246.198	AS5607 Sky UK Limited	`5.78ms` from London, GB
20.58.3.70	AS8075 Microsoft Corporation	`0.17ms` from London, GB
116.66.249.70	AS38577 LEEKIE-EN	`16.03ms` from Manila, PH
65.133.3.150	AS209 CenturyLink Communications, LLC	`1.77ms` from Orlando, US
34.200.170.182	AS14618 Amazon.com, Inc.	`0.20ms` from Reston, US
216.186.108.246	AS10430 Washington State K-20 Telecommunications Network	`2.81ms` from Seattle, US
188.148.40.70	AS1257 Tele2 Sverige AB	`4.71ms` from Stockholm, SE
23.81.46.86	AS134351 Leaseweb Japan K.K.	`0.27ms` from Tokyo, JP
34.65.43.54	AS396982 Google LLC	`0.10ms` from Zuerich, CH
178.39.101.38	AS6730 Sunrise GmbH	`2.21ms` from Zuerich, CH
24.196.226.150	AS20115 Charter Communications LLC	`7.35ms` from Atlanta, US
50.252.235.214	AS7922 Comcast Cable Communications, LLC	`6.81ms` from Boston, US
92.55.148.6	AS39737 Prime Telecom srl	`0.28ms` from Bucharest, RO
184.84.130.198	AS16625 Akamai Technologies, Inc.	`0.20ms` from Chicago, US
35.193.137.166	AS396982 Google LLC	`0.10ms` from Council Bluffs, US

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this ASN. Learn more.

traceroute -a -n -q1 188.175.198.185

traceroute to 188.175.198.185 (188.175.198.185): 64 hops max, 52 byte packets

1 [AS42473] 178.255.154.92 0.194 ms

2 *

3 *

4 [AS5610] 90.182.199.93 0.86 ms

5 [AS16246] 188.175.254.236 0.923 ms

6 *

7 [AS16246] 188.175.255.211 1.41 ms

8 [AS16246] 188.175.198.185 0.872 ms

Measurement taken from

IPinfo ProbeNet in Prague, CZ

On January 19th 2026

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What is an ASN?

Autonomous System Numbers (ASNs) are assigned to entities such as Internet Service Providers and other large organizations that control blocks of IP addresses. This network page, and the organization field that's shown on the main IP address information page and also returned in the geolocation API are based on the ASN.

The ASN details will often correspond to the IP address owner, but for smaller organizations it may be that organization's parent, or their ISP. Find out more about AS16246 at robtex.

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